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sidereal (adj) connected with stars.
Anything connected with stars is sidereal. The sidereal day, for example, is the time the earth takes to complete one revolution with reference to a star, in the case of the earth, the sun. A sidereal phenomenon is an unusual happening connected with stars and other heavenly bodies.
- Sidereal phenomena include the formation and destruction of stars, the black hole theory and such other things.
- Astrophysicists have succeeded in getting a lot of information about distant sidereal objects, like stars and other heavenly bodies.